WIP: Introduced type transformation to transform relaxed TS definition of protobuf operation strict HiveOperation type, containing all possible operation types joined as union.

TS protoc uses a discriminated union to represent oneof construct and avoid multiple body associations to one operation wrapper

build_wasm_wax.sh script automatically detects emscripten image environment to simplify its usage inside Dev Container

Defined Dev Container specification - just to allow automatic opening development environment using VSCode Dev Containers feature